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# timegm.m4 serial 8
dnl Copyright (C) 2003, 2007, 2009, 2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_TIMEGM],
[
AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_MKTIME])
REPLACE_TIMEGM=0
AC_CHECK_FUNCS_ONCE([timegm])
if test $ac_cv_func_timegm = yes; then
if test $ac_cv_func_working_mktime = no; then
# Assume that timegm is buggy if mktime is.
REPLACE_TIMEGM=1
fi
else
HAVE_TIMEGM=0
fi
if test $HAVE_TIMEGM = 0 || test $REPLACE_TIMEGM = 1; then
AC_LIBOBJ([timegm])
gl_PREREQ_TIMEGM
fi
])
# Prerequisites of lib/timegm.c.
AC_DEFUN([gl_PREREQ_TIMEGM], [
AC_REQUIRE([gl_TIME_R])
AC_REQUIRE([gl_FUNC_MKTIME])
if test $ac_cv_func_working_mktime = yes; then
AC_CHECK_FUNC([__mktime_internal], ,
[# mktime works but it doesn't export __mktime_internal,
# so we need to substitute our own mktime implementation.
AC_LIBOBJ([mktime])
AC_DEFINE([mktime], [rpl_mktime],
[Define to rpl_mktime if the replacement function should be used.])
gl_PREREQ_MKTIME])
fi
])
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